package com.darren.euc.util.light.utils;

import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public class HttpRequest {
	
	private static Logger logger = Logger.getLogger(HttpRequest.class);
	
    /**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     * @throws Exception 
     */
    public static String sendGet(String url, String param) throws Exception {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            
			for (int i = 0; i < 3; i++) {
				URLConnection connection = realUrl.openConnection();
				// 打开和URL之间的连接
				connection.setConnectTimeout(20000);
				connection.setReadTimeout(20000);
				// 设置通用的请求属性
				connection.setRequestProperty("accept", "*/*");
				connection.setRequestProperty("connection", "Keep-Alive");
				connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
				connection.setRequestProperty("Accept-Charset", "UTF-8");
				// 建立实际的连接
				try {
					connection.connect();
					// Map<String, List<String>> map =
					// connection.getHeaderFields();
					// 遍历所有的响应头字段
					// for (String key : map.keySet()) {
					// System.out.println(key + "--->" + map.get(key));
					// }
					// 定义 BufferedReader输入流来读取URL的响应
					in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "utf-8"));
					String line;
					while ((line = in.readLine()) != null) {
						result += line;
					}
				} catch (Exception ex) {					
					result = "";
					ex.printStackTrace();
				}finally{
					HttpURLConnection urlConnection = (HttpURLConnection) connection;
					urlConnection.disconnect();
				}
				if(!"".equals(result)){
					break;
				}
			}           
        } catch (Exception e) {
        	logger.error("发送GET请求出现异常！",e);
            throw e;
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e) {
            	logger.error("发送GET请求出现异常！",e);
                throw e;
            }
        }
        return result;
    }

    /**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     * @throws Exception 
     */
    public static String sendPost(String url, String param) throws Exception {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "UTF-8");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream(),"utf-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
        	logger.error("发送GET请求出现异常！",e);
            throw e;
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException e){
            	logger.error("发送GET请求出现异常！",e);
                throw e;
            }
        }
        return result;
    }

    public static String sendPostRaw(String url,String data,String access_token) throws IOException {
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost post = new HttpPost(url);
        StringEntity postingString = new StringEntity(data);// json传递
        post.setEntity(postingString);
        post.setHeader("token", access_token);
        org.apache.http.HttpResponse response = httpClient.execute(post);
        String content = EntityUtils.toString(response.getEntity());
        return content;
    }
}
